Reminded me I was going to check the English guidance
11. Travel
If you live in England, you must stay at home and avoid travel in the UK or overseas, unless for work, education or other legally permitted reasons. If you need to travel you should look to reduce the number of journeys if possible.
12. Staying away from home overnight
You cannot leave home for holidays or stays overnight away from your main home unless permitted by law. This means that holidays in the UK and abroad are not allowed. This includes staying in a second home or caravan, if you own one, or staying with anyone you do not live with or are in a support bubble with.
If you were already on holiday, you should return to your home as soon as practical and comply with the ‘stay at home’ requirements in your holiday accommodation in the meantime.